Process for the production of forged shafting



June 13, 1933. E RAMP 1,913,711

PROCESS FOR THE PRODUCTION OF FORGED S HQFTING Filed Dec. 22, 1928 Patented June 13, 1933;

PATENT OFFICE EUGEN KAMP, F DORTMUND, GERMANY PROCESS FOR THE PRODUCTION OF FORGED SHAFTING Application filed December 22, 1928, Serial No. 327.947, and in Germany June26, 1928.

Hitherto forged shafting has been produced either under the hammer or the press from a billet by rough forging and then a finishing forging and 'planishing. It is well known that the planishing of round forged )ieces is com arcd with the revious for Ill process, a tedious and expensive work. To this must be added the uneconomical utilization of the machine used, with respect to the driving power, as also the unfavorable mass movements of the machine caused by the short and quickly repeated planishingstrokes, which after a time tend to loosen and disorganize the separate parts of the hammer or 35 the press and their foundations.

By the new process according tothe invention the shaftlng rough forged as hitherto, is brought between two or more rolls of a suitable rolling mill, which may be adjusted 53 to a sufficient inclination, whereby the rolls polish the outer surface of the shafting by rotating. In this process it is of no importance whether the shafting makes the axial forward movement or whether on the contrary this movement is made by the mill. The finishing work done in this way by the mill takes a very considerably shorter time than that done under the hammer or the press by means of the hitherto usual process.

An important advantage of the new process consists in that the completed'product shows a much more true and even shape, than was previously the case. For this reason much less work may be reckoned with in the future preparation of shafting.

A process has been found by the invention which unites the improvement in quality produced by the forging with the more accurate work of the rolls. The new process therefore is a much more profitable one than those previously used.

The invention is panying drawing by way of example. Figure 1 is a front view, Figure 2 is a side view, and Figure 3 an upper view of a rolling mill for planishing the rough forged shafting.

- 1 designates the rough forged shafting which is planished by passing between the 53 rotating 0 illustrated in the accom-' lique rolls 2 and 3 and which thus obtains a completel smooth surface. 4 is a support or an auxi iary roll for supporting the work 1 during the planishing process.

What I claim and desire to secure by Letters Patent of the United States is:

1. The method of producing a uniformly accurate round shaft, including the use'of opposed oblique rolls, which in a combination of steps, consists in first forging a bar by hammering and pressing the same as much 00 as possible for the twofold pur ose of formi ng said bar approximately to nal form and dimensions and also of imparting desirable structural characteristics to the lnterior of the bar, and then finally shaping and polishing said bar into finished shape while pre-v serving the previously attained characteristics thereof, by rotating said shaft with respect to said oblique rolls. 1

2. The method of producing a uniformly 7 accurate round shaft, including the use of oblique rolls, which in a combination of steps, conslsts in first forging a bar by hammering and pressing the same as much as possible for the two. fold purpose of forming said bar apv proximately to final. form and dimensions and also of imparting desirable structural characteristics to the interior of the bar, and then finally shaping and polishing said bar into finished shape while preserving the pre viously attained characteristics thereof, by rotating said shaft with respect to said oblique rolls in contact relation with portions of said rolls intermediate the ends thereof.

3. As an article of accurate and uniform manufacture, a shaft having interior forged structural characteristics'and smooth rolled and polished exterior structure imposed upon said interior structure.

4. As an article of uniform and accurate manufacture, ashaft having a forged interior structure completely surrounded by and confined within a smooth rolled and polished exterior structure. a

5. As an article of uniform and accurate manufacture, a shaft having a forged interior structure completely surrounded by and confined within a smooth rolled exterior structure.

I EUGEN KAMP. 

